Bash--pot



E. M. CAMP DASH POT.

APPLICATION man nov. 11, 1-39.

1,394,063. Patented Oct. 18, 1921.

INVENTOR.

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UNITED STATES PATENT OFFICE.

EDGAR MAYNARD CAMP, OF NEWARK, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO WILLIAM D. BLEICK, OF NEWARK, NEW JERSEY.

DASH-POT.

Specification of Letters Patent.

Patented Oct. 18, 1921.

Application filed November 17, 1919. Serial No. 338,599.

T 0 all whom it may concern:

Be it known that I, EDGAR MAYNARD CAMP, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Dash-Pots, of which the following is a specification.

My present invention relates to dash-pots and more particularly to dash-pots suitable for use in adding machines and like mechanisms in which fluid, uch as oil, is forced from one side of a piston to the other by the relative movement between the piston and the coacting cylinder or casing.

One object of myinvention is to provide a dash-pot having new and novel means for adjusting the size of the port through which the liquid must flow from one side of the piston to the other, and thus regulating the speed or the number of strokes per minute whichcan be obtained with a given amount of power driving the device.

A feature of the present invention consists in having the aforesaid adjusting means on the outside of the apparatus and thus easy of access to the operator.

Another feature of the invention is the provision of a dash-pot in which the closing or working stroke is slower under the same power than the opening or return, stroke.

Other objects, features and advantageswillv appear more fully in the following detailed description and appended claims.

The accompanying drawing, forming a part of this specification, illustrates one embodiment of the invention.

In the drawing, I V Figure 1 is a view partly in section and partly in elevation showing the dash-pot at the. limit of its thrust. Fig. 2 is a like viewshowing the dash-pot with the port in an open position.

, Fig 3'is an enlarged view partly in section and partly in elevation of the port or valve parts in thesame'position as shown Fl .1. Re erring to the drawing, a cylindrical pot or casing 1, containing a suitable fluid 2, is. pivoted at 3 on an actuating arm 4 on a rockshaft 5. The pot or casing 1 is provided with acap .6, through which asses slidably a sleeve 7 surrounding and s idable along a rod 8 secured into a hearing 9 pivoted upon a fixed center or shaft 10. On the lower end of the sleeve 7 is secured a piston head 11. The sleeve 7 is provided with a longitudinal slot 7 near its lower extremity which embraces a pin 12 fixed in the rod 8 and the walls of which limit the downward movement of the sleeve 7 on said rod 8. The rod 8 is threaded downward a suitable distance at 8 from the point where it is secured into the bearing 9, and carries on its threaded portion outside of the pot 1 two lock and adusting nuts 13, which may be knurled to facilitate the easy adjusting of game by hand. The nuts 13 limit the upward movement of the sleeve 7 on the rod 8.

In operation, the slot 7 functions as a port to regulate the passage ofthe fluid 2 which,

during the working or compression stroke,

passes from the part 1 of the chamber be low the piston head 11 to the part 1 of said chamber above the piston head 11, the fluid 2 entering the sleeve 7 at the lower end 7 which opens to the space below the piston head and passing through said port 7, which is arranged above the piston head. During the said stroke. in the form of the invention shown, the casing or pot 1 moves upwardly relatively to the piston head 11. and the top 7 of the sleeve 7 will be forced up against the nuts 13. as in Fig. 1, thus closing the port? to the proper point. Should it be desired to close the port 7 further, the nuts should be positioned higher on the threaded portion 8 of the rod 8 and vice versa.

During the opposite stroke, shown in Fig. 2, the direction of the fluid is changed and it passes from part 1 of the chamber, through the port 7 through the end 7 of the sleeve 7 and into the part 1* of the chamber. The pressure of the fluid during this movement forces the sleeve 7 which is free to move on the rod 8 to drop to the limit allowed by the pin '12 and thus opens the port 7 to its widest capacity, thereby allowv of the fluid against such relative movement Having thus described my invention, what I claim, and desire to secure by LettersPatcm is 1. The combination of a casing having fluid therein, and means including a piston mounted therein to permit relative reciprocable movement between the casing and plston, said means having a port permitting the flow of fluid from one side of the piston to the other, and means controlling the size of said port and opening the port to a greater extent on one stroke than on the opposite stroke whereby the retarding action of the fluid against such relative movement is greater for one stroke than the opposite stroke, said port controlling means being adjustable to vary the size of the port for one of said strokes.

2. The combination of a casing having fluid therein, and means including a piston mounted therein to permit relative recipro cable'movement between the casing and piston, said means having a port permitting the flow of fluid from one side. of the piston to, the other, and means controlling the size of said port and opening the port to a greater extent on one stroke than ontheopposite stroke, whereby the retarding action is greater for one stroke than the opposite stroke, said port controlling means having means arranged exteriorly of the casing for varying the size of the port'for one of said strokes.

, 3. The combination of a casing havingfluid therein, and means including a piston mounted therein to permit relative reciprocable moveinent between the piston and casing, said means having a port permitting the flow of fluid from one side of the piston to the other, and means controlling the size of said port and opening the port to a greater extent on one stroke than on the opposite stroke whereby the retarding action of the fluid against such relative movement is great 'erflfor one stroke thanthe opposite stroke, said port controlling means having means arranged exte'riorly of the casing for varying the size of 'the port for the strol'ze 1 w th the greater retarding'actio'n.

1 4; The combination of a casing having a fluid therein; a piston in said casing, and a pair of telescopically connected members, one ofwhich is connected to said-piston and the other" of which projects out of said casing, one of said members having a port by which said fluid may pass from one side or" said piston to the other, the other of said members being free to have a limited longitudinal movement with respect to the ported member to vary the extent of opening of said port, whereby said port is open to a greater extent upon one stroke than upon thev opposite stroke.

5. The combination of a casing having a fluid therein, a piston in said casing, and a pair of telescopically connected members, oneof which is connected to said piston and the other of which projects out of said casing, one of said members having a port by which said fluid may pass from one side of said piston to the other, the other of said members having a limited longitudinal movement with respect to the ported member to vary the extent of opening of said port, whereby said port is o-pen to agreater extent upon one stroke than'upon the opposite stroke, and one of said members having means for varying the extent of such limited longitudinal movement. I 6. The combination of a casing having a fluid therein, a piston insaid casing, and a pair of telescopically connected members,

oneof which is c nnected to said piston a nd the other-of which projects out of said casing, one ofsaid members having a port by which said fluidmay pass from one side of said: piston to the other, the other of said members having a limitedflongitudinal movement with respect to the ported'inem'ber to vary the extent of openingof saidpo'r't,

7 whereby said port is open to a greater extent upon one stroke than upon theopposite stroke, one of said members having means adjustable outside of said casing forvarying the extent of n such limited longitudinal movement. V

7; The combination of a casing having a fluid therein, pair of telescopically connected members, one ofwhich is connected to said piston, one of said members having a port by which said fluid may pass fromone side" of said a piston in said casing, and a piston to the other; the other of said members having a limited longitudinal movement with respect to the ported-"member to vary the extent of opening of said port, whereby said port is open to a greateryextentgupon one stroke than upon the opposite stroke,

on'eof said members having a device adj ustably mounted thereon andforming astop for the other inember,"said' device being arranged exteriorly' of the casing.-

- 8;Th combination Ora casing having a pair-of telescopically 'cb'nnectedf members,

of said fluid therein, a piston in said casing," and a V fliiid pass' from one .sideo said piston to the other, the other of saidlmember s having a nmate longitudinal movement with respect to the ported member to vary the extent of opening of said port, whereby said port is open to a greater extent upon one stroke than upon the opposite stroke,

5 said members having means adjustable outside of said casing for varying the extent of such limited longitudinal movement, said means comprising a member adjustably mounted on one of said members and forming a stop for the other member, and means 10 for preventing accidental displacement of said adjustably mounted member.

In testimony whereof, I have signed my name to this specification.

EDGAR MAYNARD CAMP. 

